Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4676b5e80d3dd11…

MALICIOUS

PDF

70.5 KB Created: 2021-01-22 01:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9cc6fc30706dbc4f4a0d21461c18a6cc SHA-1: 725dfaf78c8597a57cae4cdf721a23d3d8299584 SHA-256: e4676b5e80d3dd11ef589a7fb9ae21529ae0fc4174c3d9f71ef1a63819cddafa
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/aws?utm_term=fairfields+primary+school+basingstoke+uniform PDF link annotation
    • https://site-1175307.mozfiles.com/files/1175307/temple_escape_room_games_online_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449406/normal_5feb109b40135.pdfIn PDF document text
    • https://cdn.sqhk.co/pemiduwegam/cWigDgc/betty_crocker_recipes_ice_cream_cone_cupcakes.pdfIn PDF document text
    • https://site-1166673.mozfiles.com/files/1166673/barber_shop_san_antonio_downtown.pdfIn PDF document text
    • https://disebaxixifos.weebly.com/uploads/1/3/4/7/134714932/7545226.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/t5N0jga/attention_screen_time_stay_focused_at_work.pdfIn PDF document text
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/tafukawemipem-fagiwavivefoveg-rosobitosuja.pdfIn PDF document text
    • https://site-1245794.mozfiles.com/files/1245794/intermediate_cuneiform_bone_function.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455399/normal_5fd0fb565e40d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473403/normal_6002704abf954.pdfIn PDF document text
    • https://kofasarafafe.weebly.com/uploads/1/3/5/3/135390193/7995a8.pdfIn PDF document text
    • https://zelowomuguzak.weebly.com/uploads/1/3/1/3/131379017/jukexexiwore-tigawapane-zogijafuwebi-faraxebofe.pdfIn PDF document text
    • https://site-1173507.mozfiles.com/files/1173507/annoying_ringtones_ring_ring.pdfIn PDF document text
    • https://nobakunifiximup.weebly.com/uploads/1/3/5/3/135310199/1567532.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/soul_calibur_6_cervantes_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD614 5832 bytes
SHA-256: da38e83fb9fbc3ef38631d60212d87f014e1aacc4173e520c708734733e5caa7
font_01_sfnt_off0000e9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CF 10276 bytes
SHA-256: f30acd9bcabde88cb57a94e2105107935fff0ca980a07c3c48406a6710af631a

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